| EDUTOOL APPS E-CO LIMITED | Private company limited by shares | Live |
| HK E-CO CLEAN MATERIAL TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| ECO. DECORATION (HK) LIMITED | Private company limited by shares | Live |
| ECO. ENGINE CO., LIMITED | Private company limited by shares | Live |
| HEXASTAR (ECO) LIMITED | Private company limited by shares | Live |
| ECO- LIFE HOLDINGS CORP LIMITED | Private company limited by shares | Live |
| ECO. INTERIOR DESIGN AND DECORATION LIMITED | Private company limited by shares | Live |
| JIAMA INTERNATIONAL (ECO) LIMITED | Private company limited by shares | Live |
| DerJin (Eco Valve) International Company Limited | Private company limited by shares | Live |
| Arrow (Eco) Lighting Limited | Private company limited by shares | Dissolved |
| Eco. Modular System Limited | Private company limited by shares | Live |
| DARG Partners (ECO) Limited | Private company limited by shares | Live |
| E-CO WORLDWIDE COMPANY LIMITED | Private company limited by shares | Live |
| HK S.T. ECO2 CO., LIMITED | Private company limited by shares | Live |
| SHENZHEN ECO2LUX LED LIGHTING CO., LIMITED | Private company limited by shares | Live |
| ECO8.NET LIMITED | Private company limited by shares | Dissolved |
| ECOable Limited | | Live |
| ECOACH LIMITED | Private company limited by shares | Live |
| ECOACT LIMITED | Private company limited by shares | Dissolved |
| HONG KONG INTERNATIONAL 3R ECO-ACTION LIMITED | Private company limited by shares | Live Commenced dormancy on 14-May-2014 |
| 3R HONG KONG INTERNATIONAL ECO-ACTION LIMITED | Private company limited by shares | Live |
| Eco-Activist Company Limited | Private company limited by shares | Live |
| EcoAdvance (HK) Limited | Private company limited by shares | Dissolved |
| EcoAdventure Travel Limited | Private company limited by shares | Live |
| ECO-ADVENTURES FOUNDATION LIMITED | Company limited by guarantee | Live |
| Ecoae Gifts Limited | | Live |
| EcoAg (Hong Kong) Capital Co., Limited | Private company limited by shares | Live |
| Eco-Agricity Developments Limited | Private company limited by shares | Dissolved |
| ECO-AGRICULTURE INVESTMENTS LIMITED | Private company limited by shares | Live |
| MINNONG ECOAGRICULTURE CO. LIMITED | Private company limited by shares | Dissolved |
| E-COAL INTERNATIONAL CO., LIMITED | Private company limited by shares | Live |
| eCoalsphere International Limited | Private company limited by shares | Live |
| EcoAmigo Consulting Engineers Limited | Private company limited by shares | Live |
| EcoAmigos Technologies Limited | Private company limited by shares | Live |
| ECOAPOLLO LIGHTING LIMITED | Private company limited by shares | Live |
| ECOAPPLS COMPANY LIMITED | Private company limited by shares | Live |
| EcoArch Co. Limited | Private company limited by shares | Live |
| Eco-Asia Co Limited | Private company limited by shares | Live |
| Ecoasis Agritech Limited | Private company limited by shares | Live |
| E-COASTAL LIMITED | Private company limited by shares | Dissolved |
| ECOAT COMPANY LIMITED | Private company limited by shares | Dissolved |
| ECOAT ELECTROPLATING FINISHING CO. LIMITED | Private company limited by shares | Dissolved |
| GREEN & SAFE eCOATING MANUFACTURING LIMITED | Private company limited by shares | Dissolved |
| ECOAUS (CHINA) LIMITED | Private company limited by shares | Dissolved |
| ECO-AXIS LIMITED | Private company limited by shares | Live |
| ECOB LIMITED | Private company limited by shares | Live |
| LY ECOBAG LIMITED | Private company limited by shares | Live |
| REGREEN ECOBAGS CO., LIMITED | Private company limited by shares | Dissolved |
| ECOBAN INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| ECOBAN PACIFIC LIMITED | Private company limited by shares | Live |
| ECOBELLE GROUP LIMITED | Private company limited by shares | Live |
| Ecobelsa Trading (HK) Limited | Private company limited by shares | Live |
| ECOBENE LIMITED | | Live |
| Ecobenign Plastic Technology Limited | Private company limited by shares | Live |
| EcoBest Company Limited | Private company limited by shares | Live |
| SHENZHEN ECO-BETTER ELECTRONICS CO., LIMITED | Private company limited by shares | Live |
| ECOBIO TECHNOLOGY (CHINA) LIMITED | Private company limited by shares | Live |
| ECOBOBO LIMITED | Private company limited by shares | Dissolved |
| ECO-BOX LIMITED | Private company limited by shares | Live |
| ECOBRAND LIMITED | Private company limited by shares | Dissolved |
| Ecobrands (Hong Kong) Limited | Private company limited by shares | Live |
| EcoBricks Limited | Private company limited by shares | Live |
| ECOBRIDGE COMPANY LIMITED | Private company limited by shares | Live |
| EcoBro Commerce Co., Limited | Private company limited by shares | Live |
| HONDA ECO-BUILDING MATERIALS INDUSTRIAL CO., LIMITED | Private company limited by shares | Live |
| ECOBUS LIMITED | Private company limited by shares | Live |
| ECOBUS CORPORATION LIMITED | Private company limited by shares | Live |
| Ecobus (Hong Kong) Environmental Foundation Limited | Company limited by guarantee | Live |
| Ecocables Electronics Co., Limited | Private company limited by shares | Live |
| ECOCAR IMPEX (HONGKONG) LIMITED | | Live |
| Carbonneutral Eco-Cement Investment Limited | Private company limited by shares | Dissolved |
| Eco-Cement Technology Limited | Private company limited by shares | Dissolved |
| Fortune Manor Eco-Cemetery Group Limited | Private company limited by shares | Live |
| ECOCENTA LIMITED | Private company limited by shares | Live |
| ECO-CENTRIX PTY LIMITED | Private company limited by shares | Live |
| Ecocept Creation Limited | Private company limited by shares | Live |
| L&H ECO-CHEMICALS LIMITED | Private company limited by shares | Live |
| PSI (Eco-City) Limited | Private company limited by shares | Live |
| Ecocity Investment Limited | Private company limited by shares | Live |
| Eco-Clouds Solutions Limited | | Live |
| EcoCoconut Limited | Private company limited by shares | Live |
| EcoCompany Asia Pacific Limited | Private company limited by shares | Live |
| Eco-Connect Limited | Private company limited by shares | Dissolved |
| CHINA FORESTRY ECO-CONSERVATION & PROPERTY MANAGEMENT CO., LIMITED | Private company limited by shares | Dissolved |
| NEANTHES ECO-CONSULTANT LIMITED | Private company limited by shares | Live |
| ECOCONSULTING LIMITED | Private company limited by shares | Live |
| eWASTE Eco-Consulting HK Limited | Private company limited by shares | Live |
| ECOCORE CO., LIMITED | Private company limited by shares | Live |
| ECOCORE OPTO-ELECTRONIC CO., LIMITED | Private company limited by shares | Live |
| ECOCORE INDUSTRY CO., LIMITED | Private company limited by shares | Live |
| GRAND SUCCESS ROAD ECO-CREATIVE GROUP LIMITED | Private company limited by shares | Dissolved |
| ECOCTOURISM LIMITED | Private company limited by shares | Live |
| ECODA LIMITED | Private company limited by shares | Dissolved |
| ECODA INVESTMENT LIMITED | Private company limited by shares | Live |
| ST. ECODALL SCIENCE CO., LIMITED | Private company limited by shares | Live |
| ECODESI LIMITED | Private company limited by shares | Live |
| EcoDesign Planning (Hong Kong) Limited | Private company limited by shares | Dissolved |
| CHINA ECODESIGN RESEARCH INSTITUTE CO., LIMITED | Private company limited by shares | Dissolved |
| H&F Eco-Development Limited | Private company limited by shares | Live |
| EASTKINGDOM ECO-DEVELOPMENT LIMITED | Private company limited by shares | Dissolved |